A2Trig13­3Day2Spring16.notebook May 04, 2016 Algebra 2 Ch.13 Notes Page 56 Part 1 P56 13­3 Radian Measure May 12­11:11 AM 13­3 Radian Measure Central Angle: angle with a vertex at the center of a circle. Intercepted Arc: the portion of the circle with endpoints on the sides of the central angle and other points within the interior of the angle. Radian: a central angle that intercepts an arc that has the same length as a radius of the circle. May 12­11:29 AM 1 A2Trig13­3Day2Spring16.notebook May 04, 2016 May 12­11:14 AM May 12­11:30 AM 2 A2Trig13­3Day2Spring16.notebook May 04, 2016 Find the radian measure of a 60 angle. Find the degree measure of 3π radians. 3π May 12­2:40 PM Find the degree measure of 3π radians. Find the radian measure of a 60 angle. 60 x π radians 180 3π radians x 180 π radians May 12­2:45 PM 3 A2Trig13­3Day2Spring16.notebook May 04, 2016 HW #60 Part 1 13­3 WS Please put your name and class period at the top of the homework. Also include the homework number. May 12­3:00 PM ? May 12­11:31 AM 4 Attachments A2Trig13­1to13­2Day2What Radian.ppt